Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20e3ccab17df96a…

MALICIOUS

PDF

85.6 KB Created: 2021-02-22 20:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c4fab5816087369f5bc9cbd95dd51dd3 SHA-1: b92cb9735511c87dba86f4949abf9cbca29d5170 SHA-256: e20e3ccab17df96acec1e154c6f1f7a9fe3bc2b61b5723e01b925842ba16678a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/strik?utm_term=2019+s60+t8+review PDF link annotation
    • http://italia-doc.space/digestion_de_carbohidratos_lipidos_y_proteinasx9tuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_60287175c7d9c.pdfIn PDF document text
    • http://kvyovk.xyz/doxezowbm9kn.pdfIn PDF document text
    • https://cdn.sqhk.co/ridefapagol/JihjWUJ/weeds_cast_season_1_episode_5.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/REq6JWZ/plants_vs_zombies_download_free_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ggjiJZr/printable_50_states_license_plate_game.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/osgjhfL/dynamons_2_by_kizi_hack_version.pdfIn PDF document text
    • http://axecheat6.xyz/10th_class_maths_notes_inza56d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_6009da8b1e8cd.pdfIn PDF document text
    • http://losinglotterynumbers.com/creepypasta_amino_apkv7usq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fcedde230c93.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/SSheTnB/nisivanep.pdfIn PDF document text
    • http://fastcreditcheck.info/feliz_navidad_movie_2020_soundtrackrx83h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_601494bc7ab01.pdfIn PDF document text
    • http://cleanup-sale.site/joker_movie_mp3_songs_free_downloada00ov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc919697d0d6.pdfIn PDF document text
    • http://befigter.xyz/computer_coding_classes_for_adults_near_mev63rq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fe40058207e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_602452c5abff5.pdfIn PDF document text
    • http://reduslimitaly.website/what_is_the_journal_entry_to_close_the_income_summary_accountilapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 5324 bytes
SHA-256: 319af42b1275552ecd6f1588698eb832bccc51aa133f899a9a43f41c595fab22
font_01_sfnt_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 11696 bytes
SHA-256: fde4d5f972c8f8eac1645b4c5bc31df53e3572c272fc8853d4e5af4b5a1a784e
font_02_sfnt_off0001344d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344D 16076 bytes
SHA-256: 75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc

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